BUONO UNO R3 Arduino compatible

BUONO UNO R3 is an Arduino compatible board, It’s based on Arduino UNO R3 design, So you can use BUONO UNO as Arduino UNO, All Code, shield and IDE for Arduino UNO R3 are also valid on BUONO UNO, Some visible improvement on hardware make BUONO more flexible and easier use , For example: 3.3V or 5V IO selectable allow you connect some 3.3V modules (such as XBee) to BUONO directly.